there's a reported rape every 6.2 minutes in the united states, and that's what's reported. there's a lot more rapes happening. more than twice that they think. since this recent attack , there have been a number of inquiries about self defense classes at impact bay area >> we teach a free introduction to self defense class at sports basement every month, but in response to this we've added 2 new free classes in january on the 18th and 28th >> those classes include the basics. and it makes a difference to practice those skills. >> especially in our longer classes we use an instructor in a padded suit so students cann feel what it's like in an adrenaline freeze response, and they learn what it feels like to hit full force, and that gets into your muscle memory so if something happens you don't have to think about it, your body just does it. >> flyers like these are being handed out and posted all over the neighborhood in an effort to keep everyone informed. in san francisco's kron 4 news. return to index of stories... felicia reid, kron 4. >> in the north bay -- a teenager's